/*
 * Copyright (c) 2018-2019, NVIDIA CORPORATION.  All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
#pragma once

#ifdef _WIN32

#define WINDOWS_LEAN_AND_MEAN
#define VC_EXTRALEAN
#define NOMINMAX
#include <windows.h>  // QueryPerformanceFrequency, QueryPerformanceCounter

inline double GetTime()
{
  unsigned long long counter, frequency;
  QueryPerformanceCounter((LARGE_INTEGER*)(&counter));
  QueryPerformanceFrequency((LARGE_INTEGER*)&frequency);

  return (double)counter / (double)frequency;
}

#else

#include <sys/time.h>
#include <unistd.h>

inline double GetTime()
{
  timeval tv;
  gettimeofday(&tv, NULL);
  return (double)(tv.tv_sec * 1000000 + tv.tv_usec) / 1000000.0;
}

#endif
